Correct spelling for the English word "Muccusness" is [mˈʌkəsnəs], [mˈʌkəsnəs], [m_ˈʌ_k_ə_s_n_ə_s] (IPA phonetic alphabet).
The state of being mucous.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.